Recent catalog discovery by forum expert Volker Hornbostel has now proven many of the pieces previously thought to be Roth are in fact Marei. Other catalogs came forth from several sources, which confirmed this to be true. Although there are many pieces on this list that can be found with Roth labels on them. All through its history Marei re-used its form numbers, and from the catalogs i now have, they also re-used the glaze names as ell.

The numbers effected are shown below, it is not a full list as of yet,but work in progress.